I believe the grading logic applied to Question 9 is correct on two of the quizzes, but incorrect on one of them.
The incorrect version has the following question:
Q. “True/False: Using the equations for the GRU and LSTM below the Update Gate and Forget Gate in the LSTM play a different role to Γu and 1- Γu.”
My answer:
A. False
Grader says: “Incorrect! Instead of using Γu to compute 1 - Γu, LSTM uses 2 gates (Γu and Γf) to compute the final value of the hidden state. So, Γf is used instead of 1 - Γu.”
The grader is incorrect here, because in this question – on the other versions of this quiz at least – the order of the answer is strict.
In the question the order is:
“Update Gate and Forget Gate” which corresponds to Γu and 1- Γu, respectively. Meaning they play the same role. However the T/F statement declares they play a different role, so when we apply the same strict-order logic as the other versions of this question, is False, not True.
I think that the person who applied grading logic got confused because it looks like there are variables used which switch both the word same/different and the order of Γu and 1- Γu (but I can’t be sure as I can’t access the other versions, only the latest one).
